<!DOCTYPE html>
<html>
<head>
  <meta charset='utf-8'>
  <meta http-equiv='X-UA-Compatible' content='IE=edge'>
  <title>Page Title</title>
  <meta name='viewport' content='width=device-width, initial-scale=1'>
</head>
<body>
  <script>
    setTimeout(()=>{
      one()
    }, 0)

    function one() {
      two()
    }

    function two() {
      three()
    }

    function three() {
      foo.bar()      
    }
  </script>
</body>
</html>
